latitude longitude in_between_lat in_between_lon
   2.456     4.566     2.456          4.566
                       2.466          4.576
                       2.476          4.586
                       2.486          4.596
   3.457     6.455     3.457          6.455
   4.809     7.787     4.809          7.787
                       4.819          7.797
                       4.829          7.807
   5.679     9.852     5.679          9.852